Can I limit the number of participants in a Group Activity?

I'd like to know if there is a way to limit the number of participants in a group activity (SharePlay). Looking through the API, I could not find anything regarding limiting or requiring the number of participants.

Unfortunately, there is currently no way to limit the number of participants, as everyone on the FaceTime call is eligible to join into the SharePlay activity - and up to 33 people can be in a FaceTime call. If you will find this useful, please file it in feedback assistant so we can consider your use case!

Can I limit the number of participants in a Group Activity?
 
 
Q